Nova Scotians again went into the dark for Earth Hour.

Nova Scotia Power’s energy control centre reported an 18-megawatt reduction in power consumption between 8:30 and 9:30 p.m. on Saturday, when Earth Hour 2010 took place and people were asked to turn off their lights.

According to local organizers, this represented an equivalent savings of more than 1.4 million, 13-watt compact fluorescent light bulbs.

In downtown Halifax, a free concert marking Earth Hour drew a small crowd at Grand Parade Square in front of city hall before the lights were dimmed on a cold evening.

Ken Boudreau of Halifax said he came to the concert because one person can make a difference even when it comes to global issues.

“It shows that a little by everybody means a lot,” he said. “That’s what we’re trying to show.”

The Angus L. Macdonald Bridge went dark a few minutes before 8:30 p.m. Saturday and the MacKay Bridge followed suit.

In total, some 4,000 cities in more than 120 countries took part in Earth Hour 2010, a global initiative to show support for action on climate change.